How to use the pibooth.controls.GPIO function in pibooth

elif menu and not menu.is_shown():
                    self.initialize()
                    menu = None
                else:
                    self.state_machine.process(events)

                pygame.display.update()
                clock.tick(fps)  # Ensure the program will never run at more than x frames per second

        finally:
            self.makers_pool.quit()
            self.led_startup.quit()
            self.led_preview.quit()
            self.led_capture.quit()
            self.led_print.quit()
            GPIO.cleanup()
            self.camera.quit()
            self.printer.quit()
            pygame.quit()

def __init__(self, config):
        self.config = config

        # Clean directory where pictures are saved
        self.savedir = config.getpath('GENERAL', 'directory')
        if not osp.isdir(self.savedir):
            os.makedirs(self.savedir)
        if osp.isdir(self.savedir) and config.getboolean('GENERAL', 'clear_on_startup'):
            shutil.rmtree(self.savedir)
            os.makedirs(self.savedir)

        # Prepare GPIO, physical pins mode
        GPIO.setmode(GPIO.BOARD)

        # Prepare the pygame module for use
        os.environ['SDL_VIDEO_CENTERED'] = '1'
        pygame.init()
        # Dont catch mouse motion to avoid filling the queue during long actions
        pygame.event.set_blocked(pygame.MOUSEMOTION)

        # Create window of (width, height)
        init_size = self.config.gettyped('WINDOW', 'size')
        init_color = self.config.gettyped('WINDOW', 'background')
        init_text_color = self.config.gettyped('WINDOW', 'text_color')
        if not isinstance(init_color, (tuple, list)):
            init_color = self.config.getpath('WINDOW', 'background')
        if not isinstance(init_size, str):
            self.window = PtbWindow('Pibooth', init_size, color=init_color, text_color=init_text_color)
        else:

def switch_off(self):
        """Switch off the LED.
        """
        if threading.current_thread() != self._blinking_thread:
            self._blinking_thread.unregister(self)
        GPIO.output(self.pin, GPIO.LOW)

def __init__(self, pin, bouncetime=0.1):
        self.pin = pin
        # Use internal pull up/down resistors
        GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)

        GPIO.add_event_detect(self.pin, GPIO.FALLING,
                              callback=self.on_button_down,
                              bouncetime=int(bouncetime * 1000))

def __init__(self, pin):
        self.pin = pin
        GPIO.setup(pin, GPIO.OUT)